Pension and Other Post-Retirement Benefits - Additional Information (Details) (Post-Retirement Benefits, USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014
Post-Retirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected contribution to defined benefit plan	$ 1.5

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

No definition available.

Name:	us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration